Satelec X-Mind DC - Exposure Factor Checks

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OPERATING INSTRUCTIONS
1. RADIOGRAPHIC VOLTAGE (kVp)
The radiographic high voltage is measured using a calibrated "non-invasive" instrument
with an initial delay of 50 m. sec.
Line Voltage = nominal V ±15%
Max Voltage Drop = 3 %
kVp = 60 - 70
mA = 4 - 8
SET TECHNICAL
VALUES
Set Exposure Time = 3.2 sec
The radiographic VOLTAGE is 60 kVp - 70 kVp ±10 %
2. RADIOGRAPHIC CURRENT (mA)
The radiographic current is measured by connecting a milliampmeter inside the tube head
Line Voltage = Nominal V ±15%
Max Voltage Drop = 3 %
kVp = 60 - 70
mA = 4 - 8
SET TECHNICAL
VALUES
Set Exposure Time = 3.2 sec
The radiographic CURRENT is 4mA - 8mA ±10 %
3. DOSE (mGy)
The dose in the air is measured with a "non-invasive" instrument, by positioning the
detector at an SSD (source-skin distance) of 31 cm (12”) or 20 cm (8”)
Line Voltage = Nominal V ±15 %
Max Voltage Drop = 3 %
kVp = 60 - 70
mA = 4 - 8
SET TECHNICAL
VALUES
Set Exposure Time = 1 sec
DOSE in the air =
SSD = SOURCE-SKIN DISTANCE = 31 CM (12”)
SSD = SOURCE-SKIN DISTANCE = 20 CM (8”)
70 kVp – 8 mA = 5.5 mGy/s ±30 % 70 kVp – 8 mA = 12 mGy/s ±30 %
60 kVp – 8 mA = 4.5 mGy/s ±30 % 60 kVp – 8 mA = 9 mGy/s ±30 %
70 kVp – 4 mA = 3 mGy/s ±30 % 70 kVp – 4 mA = 6 mGy/s ±30 %
60 kVp – 4 mA = 2.2 mGy/s ±30 % 60 kVp – 4 mA = 4.5 mGy/s ±30 %
4. EXPOSURE TIME (sec)
The exposure time is measured with a “non-invasive” instrument.
Line Voltage = Nominal V ±15 %
Max Voltage Drop = 3 %
kVp = 60 - 70
mA = 4 - 8
SET TECHNICAL
VALUES
Set Exposure Time = 3.2 sec
The EXPOSURE TIME measured is 3.2 sec ±10 %
11. CHECKING THE EXPOSURE FACTORS